Topotactic transformation of naturally occurring layer silicates into porous framework silicates

该项目的主要目标是：1)确定镁辉石、肯雅石和可能的硅水石的晶体结构。2)分析了层性质（厚度、Q3/Q4比、末端硅醇基间距、层电荷）对制备的微孔骨架硅酸盐的稳定性和孔隙率的影响。(3)加深对转化过程的理解，如果可能的话，建立一种直接的方法，通过层状硅酸盐的拓扑转化来生产结构有序的微孔硅酸盐。4)本项目还将致力于通过层状硅酸盐的拓扑凝聚或拓扑膨胀合成新的、结构有序的微孔硅酸盐。将使用矿物及其合成对应物。一些相关的含有机阳离子的硅酸盐层也可能包含在研究中。

The main goals of the project are:1) Determination of the crystal structures of magadiite, kenyaite and possibly silhydrite.2) Analysis of the influence the layer properties (thickness, Q3/Q4 ratio, distance of terminal silanol groups between each other, layer charge) have on the stability and porosity of the produced microporous framework silicates.3) The development of a deeper understanding of the transformation process and if possible the establishment of a straight-forward-method towards the production of structurally ordered, microporous silicates by the topotactic conversion of layer silicates.4) This project will also aim on the synthesis of new, structurally ordered, microporous silicates by topotactic condensation or topotactic expansion of layer silicates. Minerals as well as their synthetic counterparts will be used. A few related layer silicates containing organic cations may also be included in the study.